A nurse is providing teaching to the parents of a newborn who has a prescription for a home phototherapy biliblanket.
Which of the following statements should the nurse include in the teaching?

Choice A rationale

A sudden gush of amniotic fluid typically indicates rupture of membranes (ROM), which can be spontaneous or induced. While ROM can occur during labor, it is not a direct indicator of uterine rupture, which is a catastrophic event involving the tearing of the uterine wall and often presents with different clinical signs.

Choice B rationale

Hypotension with a blood pressure of 85/40 mm Hg is a critical finding suggesting hypovolemic shock, often due to internal hemorrhage, which is a common consequence of uterine rupture. The sudden loss of maternal blood into the abdominal cavity leads to a rapid decrease in circulating blood volume and subsequent systemic hypotension.

Choice C rationale

Severe bradypnea with a respiratory rate of 10/min is not a primary indicator of uterine rupture. Bradypnea often suggests central nervous system depression, possibly from medication effects or other neurological events, but is not a direct physiological response to the acute blood loss and pain associated with a uterine tear.

Choice D rationale

Palpation of the fetal presenting part in the cervical os is a normal finding during labor progression as the fetus descends. However, if the presenting part is palpated higher or outside the uterus, it can indicate expulsion of the fetus into the abdominal cavity following a complete uterine rupture, which is an abnormal and emergent finding.

Choice A rationale

Administering a rubella immunization during pregnancy is contraindicated because the rubella vaccine is a live attenuated virus vaccine. There is a theoretical risk of viral transmission to the fetus, which could lead to congenital rubella syndrome. Vaccination should occur postpartum to protect future pregnancies.

Choice B rationale

Breastfeeding is not contraindicated after receiving the rubella vaccine. Although rubella vaccine virus can be excreted in breast milk, it generally does not cause clinical illness in the infant and passive transfer of antibodies may provide some protection to the infant.

Choice C rationale

A rubella titer of 1: indicates a low level of rubella antibodies, meaning the client is susceptible to rubella infection. A titer of less than 1: or 1: is generally considered non-immune, requiring vaccination to prevent congenital rubella syndrome in future pregnancies.

Choice D rationale

Repeating a rubella titer in the third trimester is not a standard practice for assessing susceptibility. Once susceptibility is determined, the primary intervention is postpartum vaccination. The initial titer result accurately reflects immune status and further testing during pregnancy is unnecessary.